package LimitedTimeGame.Day_0326;

import java.util.Scanner;

/**
 * @author zxc
 * @date 2023/03/26 16:53
 **/

class Solution {
    public String Encode(int n , String str){
        int[] temp = new int[26];
        for(int i = 0; i < 26 ; i++){
            if(i < 3){
                temp[i] = i + 23;
            }
            else{
                temp[i] = i - 3;
            }
        }
        StringBuilder result = new StringBuilder("");
        char[] arr = str.toCharArray();
        for(int i = 0 ; i < n ; i++){
            char ch = (char) (temp[arr[i] - 'a'] + 'a');
            result.append(ch);
        }
        return result.toString();
    }
}
public class Main
{
    public static void main(String args[])
    {
        Scanner scanner = new Scanner(System.in);
        int n = scanner.nextInt();
        String str = scanner.next();
        Solution solution = new Solution();
        System.out.println(solution.Encode(n, str));
    }
}